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It is very simple...

Program Sorce Code:-

Type this code in your compiler. Then Compile and Run. I have used Dev C++.


# include <stdio.h> 
main () 
{ 
    int X; 
    printf("X = "); 
    scanf("%d",&X); 
    if(X%2==0) 
    printf("NUMBER IS EVEN"); 
    else 
    printf("NUMBER IS ODD"); 
} 

INPUT:-

Program Sorce Code:-

Type this code in your compiler. Then Compile and Run. I have used Dev C++.

# include <stdio.h> 
main () 
{ 
    int p=5000,r=3; 
    int T,SI,AMT; 
    printf("Principal = %d\nRate = %d % \n",p,r); 
    printf("Time="); 
    scanf("%d",&T); 
    SI=(p*r*T)/100; 
    AMT=SI+p; 
    printf("\n Amount at the end of %d years is=%d",T,AMT); 

} 

INPUT:-

Program Sorce Code:-

Type this code in your compiler. Then Compile and Run. I have used Dev C++.

#include <stdio.h>
void main()
{
  int num1, num2, max;
  printf("Enter two positive integers: ");
  scanf("%d %d", &num1, &num2);
  max=(num1>num2)?num1:num2;
  while(1)                      
  {
      if(max%num1==0 && max%num2==0)
      {
          printf("\nLCM of %d and %d is %d", num1, num2,max);
          break;          
      }
      ++max;
  }
  getch();
}

INPUT:-

Actually, it is a very easy program. The only difficulty that one may have is to find a logic in making that program .

Type this code in your compiler. Then Compile and Run. I have used Dev C++.

#include<stdio.h>
int main()
{
    int x,y,m,i;
    printf("Insert any two number: ");
    scanf("%d%d",&x,&y);
    if(x>y)
         m=y;
    else
         m=x;
    for(i=m;i>=1;i--)
{
         if(x%i==0&&y%i==0)
{
             printf("\nHCF of two number is : %d",i) ;
             break;
         }
    }
    return 0;
}

INPUT:-

Let me tell you how to make a fake virus in notepad..( The following code has been made for educational purpose only ).......

1. Open the notepad from Start or Command Prompt.


2. Write the following code :-

@echo off

title Cyber Attack Sequence Initiation
color 02
echo Warning-Complete File Corruption imminent.
timeout /t 3 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 10
timeout /t 1 /nobreak >nul
ClS
echo Complete file corruption and computer shutdown in 9
timeout /t 1 /nobreak >nul
ClS
echo Complete file corruption and computer shutdown in 8
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 7
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 6
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 5
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 4
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 3
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 2
timeout /t 1 /nobreak >nul
CLS
echo Complete file corruption and computer shutdown in 1
timeout /t 1 /nobreak >nul
CLS
echo File corruption and computer shutdown initiated
timeout /t 3 /nobreak >nul
CLS
echo Corrupting Critical System Files...
echo del* *
timeout /t 2 /nobreak >nul
echo The System cannot find the file specified.
echo:
echo:
echo:
echo:
echo:
echo Corrupting Root Partition...
echo del C:\Windows
timeout /t 2 /nobreak >nul
echo Deletion Successful!
echo:
echo:
echo:
echo:
echo:
echo:
echo:
echo Disabling Windows Firewall...
echo Killing all processes...
timeout /t 2 /nobreak >nul
echo Allowing virus to boot from startup...
timeout /t 2 /nobreak >nul
echo:
echo:
echo:
echo:
echo:
echo Virus has been executed successfully!
echo:
echo:
echo Have Fun!
timeout /t 2 /nobreak >nul

shutdown -s -t 45 /c  Your computer has committed suicide. Have a nice day.

3.  Save the notepad file with any name of your choice but extension should be .BAT
 For example, save your notepad file with VIRUS.BAT.

4. Now whenever you or your friends open the file.... The Fake Virus will do its work. Enjoy

Let me tell how to open Command Prompt Window :---

1. Click on Start Button on the desktop or Just press Windows Key + R.
2. The Run dialog box will open.


3. Type cmd in the Open: field and then press Ok or press Enter.
4. The Command Prompt Window will open.

Some commonly used keyboard shortcut keys that everyone should know are :-

1. ALT+F4 - Closes the program or Opens the dialog Box to Shut Down, Sleep, Hibernate, Log off                                  Windows
2. CTRL+F - Finds a word or phrase in the document.
3. CTRL+C - Copies the text, document or folder.
4. CTRL+V - Pastes the text, document or folder.
5. CTRL+A - Selects the whole document.
6. CTRL+H - Replaces the word or phrase in a document.
7. CTRL+X - Cuts the selected item.
8. CTRL+P - Prints the current page or whole document.
9. CTRL+S - Save the current document.

Let me tell you all how to hide a folder in Windows ..... It is a common method and works in almost all version of windows.

1. Select the folder or file which u want to hide.
2. Right Click the folder and Click "Properties".



3. The "Properties" dialog box will open.


4. In the "General" tab, Click the checkbox next to "Hidden" in "Attributes:" Section.
5. Click on Apply.
6. Click OK
7. Your folder or file will get hidden.

This is one of the simplest thing in computer i.e. to make a new folder with the name of your choice. The same steps can be used to create a Shortcut, Contact, Text Document, Briefcase Etc.
Steps:-

1. Open the location where you want to create a New Folder. For E.g. Desktop
2. Right Click on the blank area.
3. Point the cursor to "New"option.
4. Click on "Folder".


5. Anew folder will be created at your specified location.
6. Rename it according to your wish.